Late-time Phase transition and the Galactic halo as a Bose Liquid: (II) the Effect of Visible Matter

Abstract

In the previous work, we investigated the rotation curves of galaxies assuming that the dark matter consists of ultra light boson appearing in ${}^{\prime }$late time phase transition' theory. Generalizing this work, we consider the effect of visible matter and classify the types of rotation curves as we vary the fraction of the mass and extention of visible matter. We show that visible matter, in galaxies with flat rotation curves, has mass fraction $2\%\sim 10\%$ and it is confined within the distance fraction $10\%\sim 20\%$.

10 pages, 10 figures included, to appear in Phys. Rev. D50,p3655

References in corpus (1)

• Late time Cosmological Phase Transition and Galactic Halo as Bose-liquid

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